From d13c88e70de9b3fd61c526ead90716fac503deed Mon Sep 17 00:00:00 2001
From: Marcos Casagrande <marcoscvp90@gmail.com>
Date: Mon, 3 Oct 2022 13:34:13 +0200
Subject: [PATCH] refactor(ext/fetch): avoid extra headers copy in .clone
 (#16130)

---
 ext/fetch/23_request.js  | 11 +++++------
 ext/fetch/23_response.js | 10 +++++-----
 2 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/ext/fetch/23_request.js b/ext/fetch/23_request.js
index 5221d5ca91..508a291394 100644
--- a/ext/fetch/23_request.js
+++ b/ext/fetch/23_request.js
@@ -35,7 +35,6 @@
     ObjectKeys,
     ObjectPrototypeIsPrototypeOf,
     RegExpPrototypeTest,
-    SafeArrayIterator,
     Symbol,
     SymbolFor,
     TypeError,
@@ -159,11 +158,11 @@
    * @returns {InnerRequest}
    */
   function cloneInnerRequest(request) {
-    const headerList = [
-      ...new SafeArrayIterator(
-        ArrayPrototypeMap(request.headerList, (x) => [x[0], x[1]]),
-      ),
-    ];
+    const headerList = ArrayPrototypeMap(
+      request.headerList,
+      (x) => [x[0], x[1]],
+    );
+
     let body = null;
     if (request.body !== null) {
       body = request.body.clone();
diff --git a/ext/fetch/23_response.js b/ext/fetch/23_response.js
index 3c19f963a8..d5adb80428 100644
--- a/ext/fetch/23_response.js
+++ b/ext/fetch/23_response.js
@@ -97,11 +97,11 @@
    */
   function cloneInnerResponse(response) {
     const urlList = [...new SafeArrayIterator(response.urlList)];
-    const headerList = [
-      ...new SafeArrayIterator(
-        ArrayPrototypeMap(response.headerList, (x) => [x[0], x[1]]),
-      ),
-    ];
+    const headerList = ArrayPrototypeMap(
+      response.headerList,
+      (x) => [x[0], x[1]],
+    );
+
     let body = null;
     if (response.body !== null) {
       body = response.body.clone();